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ASTM C 478-2005 预制钢筋混凝土检修孔构件标准规范

上一篇: ASTM C 654M-2005 多孔混凝土管标准规范(米制)
下一篇: ASTM C 412-2005 混凝土排水瓦管标准规范

Product Code:SAE J2710
Title:Modal Testing and Identification of Lower Order Tire Natural Frequencies of Radial Tires
Issuing Committee:Vehicle Dynamics Standards Committee
Scope:This SAE Recommended Practice describes test methods for measuring and identifying the lower order natural frequencies of an inflated radial tire with a fixed rim while expending modest effort and employing a minimum of test equipment. The methods apply to any size of radial tire so long as the test equipment is properly scaled to conduct the measurements for the intended test tire. Two types of boundary conditions are considered for the tire: unloaded and loaded against a flat surface. The test involves the performance and measurement of an input vibratory force (excitation) to the tire and the corresponding vibratory output (response). The data are suitable for use in determining parameters for road load models and for comparative evaluations of the measured properties in research and development. NOTES: The focus of this standard is identification and reporting of the lower order natural frequencies of the tire using a simple test procedure. While higher order natural frequencies may be excited during these tests, the reliable identification of the associated mode shapes is not addressed in this document. Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular pavements. Within the context of this Recommended Practice, forces applied to the pavement are not considered.【英文标准名称】:Preinsulatedbondedpipesystemsforundergroundhotwaternetworks-Jointassemblyforsteelservicepipes,polyurethanethermalinsulationandoutercasingofpolyethylene
【原文标准名称】:地下热水网用预先密闭连接的管道系统.成套钢铁管道设备的接头组件、聚氨酯热绝缘和聚乙烯外覆层
【标准号】:BSEN489-1995
【标准状态】:作废
【国别】:英国
【发布日期】:1995-03-15
【实施或试行日期】:1995-03-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Q83
【国际标准分类号】:23_040_99
【页数】:16P;A4
【正文语种】:英语

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